rockchip: rk3288: Add OF board setup

The new rk3288 revision rk3288w has some changes with respect
to legacy rk3288 like hclk_vio in cru and usb host0 ohci.

Linux clock driver already handle this via rockchip,rk3288w-cru
compatible.

USB ohci host can enable via dts for rk3288w based boards.

So, add fdt board setup code to update cru compatible with
rk3288w-cru compatible if the SOC revision is RK3288W.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index e2b6326..fcab1d5 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -99,6 +99,7 @@
 config ROCKCHIP_RK3288
 	bool "Support Rockchip RK3288"
 	select CPU_V7A
+	select OF_BOARD_SETUP
 	select SUPPORT_SPL
 	select SPL
 	select SUPPORT_TPL